Infra-red heater



FIG. 1 is a top perspective view of an infra-red heater showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof; and

FIG. 5 is a rear elevation view thereof. 

The ornamental design for an infra-red heater, as shown and described. 